11
Unit LEDs
Unit LEDs indicate the status of a hub’s power supply, hub speed,
collision occurrences in a hub or stack of hubs, and whether a hub is
managed.
10BASE-T
100BASE-TX
Collision
Managed
Status
Power
Change hub speed
LED
Status
Meaning
10BASE-T
On
Hub is operating at 10 Mbps.
100BASE-TX
On
Hub is operating at 100 Mbps.
Collision
Blinking
Collisions detected on hub (or stack). LED brightens as
more collisions are detected. Collisions are normal in an
Ethernet environment. Continuous blinking indicates an
overloaded network.
Off
No collisions detected.
Managed
On
Hub is managed by the optional
Management Module.
Off
Hub is not managed by the Management Module.
Status
On
Hub is operating normally.
Blinking
Hub has an internal hardware or software problem. See
the port Amber LED description on the previous page.
Managed and
Blinking
Hub failed to load its internal software properly. Try
Status
recycling the power.
Power
On
Hub is receiving power.
Off
Hub is not receiving power.
Changes the hub
speed. The default
speed is 100 Mbps.
NOTE
If you change the speed, the
hub keeps the setting until you
change it again, even if you
turn off the hub’s power.
